Saturn looked like a blob in every shot I took till a guy at the star party in Tulsa said check your focus mask | Astronomy Photos - The Design Community Hub
Saturn looked like a blob in every shot I took till a guy at the star party in Tulsa said check your focus mask
I spent about 5 nights last spring fighting with my 8 inch dob and a cheap webcam, and every single stack of Saturn came out as a mushy orange smear. I kept blaming the seeing and my mount, then a guy at the Tulsa Astronomy Club star party looked at my preview screen and asked why I was focusing by eye on the moons instead of on the rings. He pulled a Bahtinov mask out of his case, and within 10 minutes the diffraction spikes lined up and the ring gap actually showed up in a single sub. Turns out I was racking focus past the sweet spot every time because the moons looked sharp to me while the planet was way out. Anyone else get burned by focusing on the wrong thing, and do you use a mask or something else?